[ARC5] [Milsurplus] History of the GO-series of USN Long-Range Transmitters

[Mike Morrow]

I asked George:

> Do BOTH of the GO-series transmitters shown in my posting looks different from your GO-6?
>
> 1.  The GO-9 shown here:  http://aafradio.org/flightdeck/go9.htm
> 2.  The GO-unknown shown here:  http://tlbigley.com/Cutaway%20PBY/int-07.html

George sent me some fine pictures of his very rare GO-6 CG-52118 HF Transmitter, serial number 80, NOs-70048 of 21 December 1939.  It is indeed very distinctive compared to the GO-9 and GO-unknown in the links above.  He has kindly given permission for me to trim two photos to fit within the 250 kByte list limits for posting.

The six tuning bands (with veeder-root style counters) are:
1.   3000 to  4500 kHz
2.   4500 to  6000 kHz
3.   6000 to  9000 kHz
4.   9000 to 12000 kHz
5.  12000 to 18000 kHz
6.  18000 to 26500 kHz  (Type Number book says 22000 kHz is upper limit)

With little doubt, the GO-4 CG-52108 HF transmitter looks similar.

That clearly rules out GO-6 for item 2 above.  The most likely candidate now seems to be the 1935 WECo GO-2, even though that would not be expected on a post-1940 PBY-5B.

Thanks, George!

Mike / KK5F
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